* {
    margin: 0;
    padding: 0;
}

/* 顶部栏样式 */
.header {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    background-color: #2c3e50;
    color: #fff;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 25px;
    font-weight: bold;
    height: 100%;
    margin-left: 20px;
}

.title {
    margin-left: 10px;
}

/* 左侧导航栏样式 */
.sidebar {
    background-color: #2c3e50;
    height: 100vh;
}

.el-menu-vertical-demo {
    background-color: #2c3e50;
}

.el-menu-item:hover,
.el-menu-item.is-active {
    background-color: #1d2c3d;
}

/* 右侧内容区域样式 */
.main {
    margin: 20px;
    background-color: #f5f7fa;
    height: 100vh;
}